Valindra's Flesh Remover

You summon ghostly chains linking yourself and the target. Charged with negative energy chain sinks deep into the victim's flesh ripping it off the bones and causing agonizing pain. Unless the target is undead, it must make a Dexterity saving throw, taking 2d8 necrotic, 2d6 slashing damage, and is paralyzed on a failed save. On a successful save target avoids paralysis and breaks the link ending the spell. Undead and construct targets take the same damage but are restrained instead of paralyzed.

On each of your turns for the duration, while concentrating on this spell, you can use your free action to deal 2d8 necrotic and 2d6 slashing damage to the target automatically. While concentrating on this spell your speed is halved. The spell ends if you stop concentrating on it. The spell also ends if the target is ever outside the spell’s range or if it has total cover from you. At the end of each target's turns it can reattempt a Dexterity saving throw to end the spell's effect (ending your concentration on it).

A humanoid killed by this spell rises at the start of your next turn as a skeleton that is permanently under your command until the next sunrise, following your verbal orders to the best of its ability.

If the spell is used on the undead under the caster's command it is healed for the amount of necrotic damage the spell does and if the link lasted for the whole spell's duration the corporeal undead is converted into a skeleton of the same size. The spell does not convert spirits.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the damage increases by 1d8 necrotic and 1d6 slashing for each slot level above 4th and for each 2 spell slot levels above 4th spell can target additional target.